The sacrovertebral angle is the angle formed between the sacrum and the last lumbar vertebra. That there is possible a standard for the measurement of its amplitude, that this measurement is subject to variation and that variation may cause low back symptoms, it is the endeavor of this paper to prove.
Improvements in roentgen-ray technic have made available to us the lateral view of the pelvis in which the relationships of the lumbar vertebrae and the sacrum are shown in sagittal section. While many films leave much to be desired in the matter of clearness and definition, yet even in poor films we have an aid not to be despised.
It is greatly to be desired that we find some way to correlate the reading of the lateral with the anteroposterior views of the same patient. This will be touched on later.
A film of a lateral roentgenogram of the